// array,object function math data
/* Math.ceil 上取整
Math.round
Math.max
Math.min
Math.random */
var i=0
for (;true;) {
    var a = Math.ceil(Math.random() * 100 )
    
    i++
    console.log(".")
    if (a == 100)
    {
        
        console.log(a)
        break
    } else if(i=1000){
        console.log("stop")
        break
    }
        

}